Method of and apparatus for making multiply paper



Sept. 4, 1928. 1,682,826

G. L. BIDWELL METHOD OF AND APPARATUS FOR MAKING MULTIPLY PAPER Fild Aug. 4, 1925 2 Sheets-Sheet 1 I iuv LL. QQOLML INVENTOR BYL5 $R W ATTORNEY Sept. 4, 1928.

G. L. BIDWELL METHOD OF AND APPARATUS FOR MAKING MULTIPLY PAPER Filed Aug. 4, 1925 2 Sheets-Sheet INVENTOR ATTORNEY Patented Sept. 4, 1928.

' UNITED STATES PATENT OFFICE.

GEORGE L. BIDWELL, E RIEGELSVILLE, PENNSYLVANIA, AssIGNon TO THE WARREN MANUFACTURING COMPANY, on RIEGELSVILLE, NEW JERSEY, AcoEPoEArIoN OF NEW JERSEY.

METHOD OF AND APPARATUS FOR MAKING MULTIPLY PAPER.

Application filed August 4, 1925. Serial No. 48,057.

The present invention relatesv to a multiply paper, and the object thereof is the production of'such a paper in which the constituent plies are so interwoven and united as to form a substantially unitary sheet which will not split, no matter how severe the usage to which it may subsequently be P To this end the invention consists, m broadly, in successively picking up the plies or webs of wet paper pulp from the wet end of at least two of a plurality of two or more standard paper-making machines, suitably arranged therefor and preferably including it endless pick-up felt making contact with the wire screen of first one and then another of the machines, in then passing the wet paper webs between the pick-up felt upon which they have thus been superimposed and an outer endless wet felt through a suitable press, which puddles the pulp of the till several webs by forcing water carried in the wet felt through the webs and the pick-up felt just before they enter the bite of the press, and in finally pressing, drying and finishing the composite paper sheet in the usual or in any suitable manner. Til the preferred practice of my invention ll employ, where a two-ply paper only is to be I) made, one cyllnder and one Fourdrinier machine, setting the cylinder machine above the hourdrinier machine and so arranging the pickup felt that it will pick up upon its outer side first the web of wet paper pulp from the cylinder machine and then that from the Fourdrinier machine, and, for a paper of two or more plies, a battery of Fourdrinier machines which are set one above the other with their wet ends so disposed that the pick-up felt may be made to contact with the wire screens of all or of any two ormore of the machines, usually including the lowermost, as desired. The m Fourdrinier machines are equipped with suction couches for the better control of the amount of the water which is to be left in the paper webs at the point where they are picked off therefrom. The pick-up felt is so carried into contact with the wire of each paper-making machine, over a couch roll at least one Fourdrinier machine, upon anpreferably of the type illustrated in Letters Patent to Hoffman, No. 533,356, January 29, 189 5, or some equivalent thereof which, operating from its inner side, presses through the felt and against the wire of the paper-making machine and so picks up or, rather, couches off the web of paper at the point of contact. After the wet paper web has thus been couched oif from the last or lowermost paper-making machine, which 1s set at such a level that the draw of the felt therefrom will be in an approximately horizontal plane, the pick-up felt w1th the several webs of wet paper 'superimposed on its outer and then under surface 1s carried to and through the suction press. Thls suction press, of the usual or of any suitable construction, is equipped with a bottom wet felt and with an upper felt slice, which slice drains off at the sides the water forced from the wet felt up through the paper webs and. to the inner upper side of the pick-up felt and also serves as a dam to prevent the water from running out of the bite of the press and forcing the paper webs from the under side of the felt, and, in addition, carries on to of the upper press roll a metal roll on WhlCll is mounted the usual doctor for catching the fibers carried 30 into the press when the machine is started up or when a break occurs in the paper web. The puddling of the wet paper webs between these two felts immediately before they pass into the bite of the press, in the 5 manner hereinabove described, upsets their original formation and so interweaves and unites the fibers of the several Webs as to form a substantially unitary one-ply sheet of paper, the suction action of the press at this point being such as to prevent a crush and so to help the final setting together or union of the plies. On passing through the suction press the pickup felt is carried up and under the top iron roll and thence back over the usual pick-up" and guide rolls and through a felt cleaner, the bottom wet felt is carried outwardly'and over a guide roll and thence down and back, and the composite and now unified sheet of paper, stripped from the pick-up felt, is carried outwardly on the bottom wet felt from which it is lifted and carried to and through or over the usual presses, dryers, etc.

The invention is shown, by way of illustration and not of limitation, in the accompanying drawings, in which- Figure 1 is a view showing, diagrammatically, a cylinder and Fourdrinier machine, a pick-up felt, and a suction press suitably arranged for'the manufacture of a two- .ply paper according to my invention; Fig. 2 is a View, in continuation of the right-hand end of the view of Fig. 1, showing the presses, smoothing rolls and dryers through and over which the composite sheet of paper is passed after leaving the suction press; Fig. 3 is a diagrammatic view, similar to Fig. 1, of a batter of four Fourdrinier ma chines, a pick-up elt and a suction press for making a four-ply paper, illustrating an arrangement of the paper machines and of the pick-up felt whereby any one or more of the machines ma be cut out of operation if, for instance, it is desired to make a paper of less than four plies; and Fig. 4 is an enlarged diagrammatic view of the suction press.

Referring first to Figs. 1 and 2, the apparatus therein illustrated comprises a cylinder machine A and Fourdrinier machine B, both standard paper-making machines, an endless woolen blanket C which serves as a pick-up felt, a suction press D, a bottom wet felt E, and the usual second and third presses F and G, smoothing rolls H and dryers I. The c linder machine, which is provided with t e usual wire-covered cylinder 5, is mounted in osition, as shown, upon any suitable plat orm or other support; The Fourdrinier'machine, the wire screen 6 of which passes at its wet end over acouch roll 7 preferably as stated a suction couch, is mounted upon a. low base or support of a height sufiicient to raise it to the level of the suction press. The endless ick-up felt C passes around a standard Ho man or equiv- 45 alent couch roll 8, by which it is carried into contact with the wire screen of the cylinder machine and thence over a series of supportand guide-rolls to and partially around a second Holfman couch 9 and associated roll 10, which carry it into contact with the wire screen of the Fofurdrinier machine as it passes over the couch, thence in an approximately horizontal plane beneath a felt slice 11 and between the rolls 12 13 of the suction press, and thence partially around the upper press roll, below and partially around the top metal roll 14 carryin the usual doc- .tor 15, over guideand ta e-up rolls and tween the rolls 12 13 of the suction.

through a felt washer back to the cylinder The'bottom wet felt E runs beress machine.

Y and thence outwardly at an incline and ack therefrom by the pick-up felt, then the web 6 is couched off from the wire screen of the Fourdrinier machine by the Hoffman couch and superimposed upon the web a on the then under side of the pick-up felt, and the two superimposed webs are carried thereon through the suction press between the pickup felt and the bottom wet felt and are puddled as described. In leaving the suction press the composite paper sheet 0 is stripped from the pick-up felt and carried along upon 7 the outward stretch of the bottom wet felt,

. mezzanine floors or other suitable platforms,

with the couch roll 7 at the wet end of each of the three upper machines stepped back from that of the machine immediately below a distance progressively decreasing from the bottom upwards. The pick-up felt C is carried from the last of a series of upper' guide-rolls downwards, for a four-ply paper, over the four Hoffman couches 9 and accompanying rolls 10, each of which carries the felt into contact with the wire screen of one of the Fourdrinier machines and couches off therefrom upon the felt first the web I) and then in succession the webs b b b from the other machines, and from the lowermost Hoffman couch and with the four wet paper webs superimposed u on its outer lower surface is carried, as in t e case of the two-ply paper described, between the rolls 12 13 of the suction press, above the bottom wet felt E, where the webs are puddled as stated, and thereon up and back under the top metal roll 14, over the guideand take-up rolls and through a felt washer, while the composite paper sheet 0 is stripped therefrom and carried outwards on the wet felt and thence through and around the same presses and drying cylinders as pick-up felt past and'out of contact with any one, two, or all of the three upper Fourdrinier machines, as indicated by the broken lines C C? C C C C", the slack produced thereby in the felt being taken up by the take-up rolls. The lowermost Fourdrinier machine may accordingly be operated with any one or two of the three upper machines, for making a twoor three-ply paper, the remaining machine or machines being cut out and stopped; and in this way machines making webs of different character, quality, or color may be operated in various comwebs by running them hinations, as desired.

It is to be understood that-both the method and the apparatus illustrated and described niay be modified in their several details, within the scope of the appended claims, without departing from the spirit or sacrificing the'substantial advantages of the invention.

What I claim as new, and desire to secure by Letters Patent, is-- .1. The method of makinga multi-ply paper which comprises forming a plurality of wet paper webs, successively picking up the webs upon a pick-up felt, and passing the pick-up felt with the webs superimposed upon its under side to and through a suction press in contact with a bottom wet felt.

2. llhe method of making a multi-ply paper which comprises forming a plurality of wet paper webs, successively picking up .the webs upon a pick-up felt, passing the pick-up felt with the webs superimposed upon its outer under side to and through a suction press in contact with a'bottom wet felt, and damming up the water pressed from the wet felt upward through the paper webs and the pick-up felt and draining it off at the sides of the latter.

8. The method of making a multi-ply paper vvhich comprises as steps therein successively couching OE and superimposing upon a pick-up felt the webs of wet paper as formed on a plurality of paper-making machines and puddling) the superimposed etween the pick-up felt and a wet felt through a suction press.

t. lhe methodof making a multi-ply paper which comprises selectively couching off upon a pick-up felt the wet paper webs from two of a greater plurality of Fourdrinier machines set one above another and from the last machine carrying the pick-u felt and the wet paper webs superimpose upon its then lower'surface in a substantially horizontal plane through a suction press above and in contactwith a wet felt.

5. In apparatus for making multi-ply paper the combination with means for forming a plurality of wet paper webs of means for superimposing the webs and means including a suction press and a web felt passing thegethrough for paddling the superimposed we s.

-6. In apparatus for making multi-ply paper the combination with means for forming a plurality of-wet paper webs of means for superimposing the webs and means including a suction press and a wet felt running therethrough and a felt slice for puddling the webs.

7. In apparatus for making multi-ply paper the combination with means for forming a plurality of wet'paper webs of means for successively couching off from the forming means and superimposing the webs and means including a suction press and a wet felt running therethrough for puddling the superimposed webs. i

S. In apparatus for making multi-ply paper the combination with three or more Fourdrinier machines set one above another of means for selectively couching off and superimposing the paper webs from one of the upper and from the lowermost of the Fourdrinier machines and means for puddling the superimposed paper webs. I

9. In apparatus for making multi-ply paper the combination with three or more Fourdrinier machines set one above another of means for successively couching off and superimposing the wet paper webs from any two or more of the Fourdrinier machines and means including a suction press and a wet felt running therethrough for puddling the superimposed webs.

10. In apparatus for making multi-ply paper, the combination of a plurality of pa-' per-making machines set one above another,

a pick-up felt, a plurality of couch rolls over which the pick-up felt runs and each of which is adapted to carry the felt into con tact with the wire of one of the paper-mak ing machines, a suction press which is located substantially at the level of the lowermost couch rolls and through which the pickup felt is run after leaving the said couch, a bottom wet felt which is run through the suction press below the pick-up felt, and a felt slice which rests upon the inner upper side of the pick-up felt just as it is entering the bite of the press.

12. In apparatus for making multi-ply pa per the combination of a plurality of Fourdrinier machines set one above the other with the couches of their wire screens stepped back, from bottom to top, each a it may be moved away from the Fourdrinier wire to allow the pick-up felt to pass the wire without contacting therewith.

13. In apparatus for making multi-ply paper the combination with three ormore F ourdrinier machines set one above another of an endless pick-up felt, means including a plurality of couch rolls operating within the pick-up felt for selectively carrying the felt into contact with and couching ofi the wet paper webs from the wire screens of any two or more of the Fourdrinier machines, and means including a suction press and a wet felt running therethrough for puddling the Wet paper webs thus superimposed upon the pick-up felt.

GEORGE L. BIDWELL. 

